<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>state简化</title>
  </head>

  <body>
    <div id="test"></div>

    <script type="text/javascript" src="../js/react.development.js"></script>
    <script
      type="text/javascript"
      src="../js/react-dom.development.js"
    ></script>
    <script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">
      class Weather extends React.Component {
        state = { isHot: true };

        render() {
          const isHot = this.state.isHot;
          return (
            <h2 onClick={this.changeWeather}>
              今天天气{isHot ? "炎热" : "凉爽"}
            </h2>
          );
        }

        //自定义方法————要用赋值语句的形式+箭头函数
        changeWeather = () => {
          const isHot = this.state.isHot;
          this.setState({ isHot: !isHot });
        };
      }

      ReactDOM.render(<Weather />, document.getElementById("test"));
    </script>
  </body>
</html>
